<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程详情 开始 -->
    <section class="container">
      <section class="path-wrap txtOf hLh30">
        <a href="#" title class="c-999 fsize14">首页</a>
        \
        <a href="#" title class="c-999 fsize14">{{
          courseWebVo.subjectLevelOne
        }}</a>
        \
        <span class="c-333 fsize14">{{ courseWebVo.subjectLevelTwo }}</span>
      </section>
      <div>
        <article class="c-v-pic-wrap" style="height: 357px">
          <section id="videoPlay" class="p-h-video-box">
            <img
              :src="courseWebVo.cover"
              :alt="courseWebVo.title"
              class="dis c-v-pic"
            >
          </section>
        </article>
        <aside class="c-attr-wrap">
          <section class="ml20 mr15">
            <h2 class="hLh30 txtOf mt15">
              <span class="c-fff fsize24">{{ courseWebVo.title }}</span>
            </h2>
            <section class="c-attr-jg">
              <span class="c-fff">价格：</span>
              <b
                class="c-yellow"
                style="font-size: 24px"
              >￥{{ courseWebVo.price }}</b
              >
            </section>
            <section class="c-attr-mt c-attr-undis">
              <span
                class="c-fff fsize14"
              >主讲： {{ courseWebVo.teacherName }}&nbsp;&nbsp;&nbsp;</span
              >
            </section>
            <section class="c-attr-mt of">
              <span class="ml10 vam">
                <em class="icon18 scIcon" />
                <a class="c-fff vam" title="收藏" href="#">收藏</a>
              </span>
            </section>
            <section class="c-attr-mt">
              <!-- <a
                v-if="courseWebVo.price > 0"
                title="立即购买"
                class="comm-btn c-btn-3"
                @click="createOrders()"
              >立即购买</a
              >
              <a
                v-if="courseWebVo.price <= 0"
                :href="
                  '/player/' + chapterVideoList[0].children[0].videoSourceId
                "
                target="_blank"
                title="立即观看"
                class="comm-btn c-btn-3"
              >立即观看</a
              > -->
              <section
                v-if="isbuy || Number(courseWebVo.price) === 0"
                class="c-attr-mt"
              >
                <a
                  href="#"
                  title="立即观看"
                  class="comm-btn c-btn-3"
                >立即观看</a
                >
              </section>
              <section v-else class="c-attr-mt">
                <a
                  href="#"
                  title="立即购买"
                  class="comm-btn c-btn-3"
                  @click="createOrders()"
                >立即购买</a
                >
              </section>
            </section>
          </section>
        </aside>
        <aside class="thr-attr-box">
          <ol class="thr-attr-ol">
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">购买数</span>
                <br >
                <h6 class="c-fff f-fM mt10">{{ courseWebVo.buyCount }}</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">课时数</span>
                <br >
                <h6 class="c-fff f-fM mt10">20</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">浏览数</span>
                <br >
                <h6 class="c-fff f-fM mt10">501</h6>
              </aside>
            </li>
          </ol>
        </aside>
        <div class="clear" />
      </div>
      <!-- /课程封面介绍 -->
      <div class="mt20 c-infor-box">
        <article class="fl col-7">
          <section class="mr30">
            <div class="i-box">
              <div>
                <section id="c-i-tabTitle" class="c-infor-tabTitle c-tab-title">
                  <a name="c-i" class="current" title="课程详情">课程详情</a>
                </section>
              </div>
              <article class="ml10 mr10 pt20">
                <div>
                  <h6 class="c-i-content c-infor-title">
                    <span>课程介绍</span>
                  </h6>
                  <div class="course-txt-body-wrap">
                    <section class="course-txt-body">
                      <p v-html="courseWebVo.description">
                        {{ courseWebVo.description }}
                      </p>
                    </section>
                  </div>
                </div>
                <!-- /课程介绍 -->
                <div class="mt50">
                  <h6 class="c-g-content c-infor-title">
                    <span>课程大纲</span>
                  </h6>
                  <section class="mt20">
                    <div class="lh-menu-wrap">
                      <menu id="lh-menu" class="lh-menu mt10 mr10">
                        <ul>
                          <!-- 文件目录 -->
                          <li
                            v-for="chapter in chapterVideoList"
                            :key="chapter.id"
                            class="lh-menu-stair"
                          >
                            <a
                              :title="chapter.title"
                              href="javascript: void(0)"
                              class="current-1"
                            >
                              <em class="lh-menu-i-1 icon18 mr10" />{{
                                chapter.title
                              }}
                            </a>

                            <ol class="lh-menu-ol" style="display: block">
                              <li
                                v-for="video in chapter.children"
                                :key="video.id"
                                class="lh-menu-second ml30"
                              >
                                <a
                                  :href="'/player/' + video.videoSourceId"
                                  target="_blank"
                                >
                                  <!-- 收费课程 -->
                                  <span class="fr">
                                    <span v-if="courseWebVo.price > 0">
                                      <span v-if="isbuy" class="fr">
                                        <i
                                          class="free-icon vam mr10"
                                        >立即观看</i
                                        >
                                      </span>
                                      <span v-else class="fr">
                                        <i
                                          class="free-icon vam mr10"
                                        >请购买该课程</i
                                        >
                                      </span>
                                    </span>
                                  </span>
                                  <!-- 免费课程情况 -->
                                  <span class="fr">
                                    <span v-if="Number(courseWebVo.price) == 0">
                                      <span v-if="!isbuy" class="fr">
                                        <i
                                          class="free-icon vam mr10"
                                        >立即观看</i
                                        >
                                      </span>
                                    </span>
                                  </span>

                                  <em class="lh-menu-i-2 icon16 mr5">&nbsp;</em
                                  >{{ video.title }}
                                </a>
                              </li>
                            </ol>
                          </li>
                        </ul>
                      </menu>
                    </div>
                  </section>
                </div>
                <!-- /课程大纲 -->
              </article>
            </div>
          </section>
        </article>
        <aside class="fl col-3">
          <div class="i-box">
            <div>
              <section class="c-infor-tabTitle c-tab-title">
                <a title href="javascript:void(0)">主讲讲师</a>
              </section>
              <section class="stud-act-list">
                <ul style="height: auto">
                  <li>
                    <div class="u-face">
                      <a href="#">
                        <img
                          :src="courseWebVo.avatar"
                          width="50"
                          height="50"
                          alt
                        >
                      </a>
                    </div>
                    <section class="hLh30 txtOf">
                      <a class="c-333 fsize16 fl" href="#">{{
                        courseWebVo.teacherName
                      }}</a>
                    </section>
                    <section class="hLh20 txtOf">
                      <span class="c-999">{{ courseWebVo.intro }}</span>
                    </section>
                  </li>
                </ul>
              </section>
            </div>
          </div>
        </aside>
        <div class="clear" />
      </div>

      <div class="mt50 commentHtml">
        <div>
          <h6 id="i-art-comment" class="c-c-content c-infor-title">
            <span class="commentTitle">课程评论</span>
          </h6>
          <section class="lh-bj-list pr mt20 replyhtml">
            <ul>
              <li class="unBr">
                <aside class="noter-pic">
                  <img
                    width="50"
                    height="50"
                    class="picImg"
                    src="~/assets/img/avatar-boy.gif"
                  >
                </aside>
                <div class="of">
                  <section class="n-reply-wrap">
                    <fieldset>
                      <textarea
                        id="commentContent"
                        v-model="comment.content"
                        name=""
                        placeholder="输入您要评论的文字"
                      />
                    </fieldset>
                    <p class="of mt5 tar pl10 pr10">
                      <span
                        class="fl"
                      ><tt
                        class="c-red commentContentmeg"
                        style="display: none"
                      /></span>
                      <input
                        type="button"
                        value="回复"
                        class="lh-reply-btn"
                        @click="addComment()"
                      >
                    </p>
                  </section>
                </div>
              </li>
            </ul>
          </section>
          <section class="">
            <section class="question-list lh-bj-list pr">
              <ul class="pr10">
                <!-- 循环回复列表 -->
                <li v-for="comment in data.list" :key="comment.id">
                  <aside class="noter-pic">
                    <img
                      :src="comment.avatar"
                      width="50"
                      height="50"
                      class="picImg"
                    >
                  </aside>
                  <div class="of">
                    <span class="fl">
                      <font class="fsize12 c-blue">{{ comment.nickname }}</font>
                    <font class="fsize12 c-999 ml5">评论：</font></span
                    >
                  </div>
                  <div class="noter-txt mt5">
                    <p>{{ comment.content }}</p>
                  </div>
                  <div class="of mt5">
                    <span
                      class="fr"
                    ><font class="fsize12 c-999ml5">{{
                      comment.gmtCreate
                    }}</font></span
                    >
                  </div>
                </li>
                <!-- TODO回复列表 -->
              </ul>
            </section>
          </section>
          <!-- 公共分页 开始 -->
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{ undisable: !data.hasPrevious }"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)"
            >首</a
            >
            <a
              :class="{ undisable: !data.hasPrevious }"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current - 1)"
            >&lt;</a
            >
            <a
              v-for="page in data.pages"
              :key="page"
              :class="{
                current: data.current == page,
                undisable: data.current == page,
              }"
              :title="'第' + page + '页'"
              href="#"
              @click.prevent="gotoPage(page)"
            >{{ page }}</a
            >
            <a
              :class="{ undisable: !data.hasNext }"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current + 1)"
            >&gt;</a
            >
            <a
              :class="{ undisable: !data.hasNext }"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)"
            >末</a
            >
            <div class="clear" />
          </div>
          <!-- 公共分页 结束 -->
        </div>
      </div>
    </section>

    <!-- /课程详情 结束 -->
  </div>
</template>

<script>
import course from '@/api/course'
import comment from '../../api/comment'
import order from '@/api/orders'

export default {
  // 和页面异步开始的
  asyncData({ params, error }) {
    return { courseId: params.id }
  },
  data() {
    return {
      data: {},
      page: 1,
      limit: 4,
      total: 10,
      comment: {
        content: '',
        courseId: ''
      },
      courseWebVo: {},
      chapterVideoList: [],
      isbuy: false // 是否购买课程
    }
  },
  created() {
    this.initCourseInfo()
    this.initComment()
  },
  methods: {
    // 微信支付
    createOrders() {
      order.createOrders(this.courseId).then((response) => {
        // 获取返回订单号
        // 生成订单之后，跳转订单显示页面
        this.$router.push({ path: '/orders/' + response.data.data.orderId })
      })
    },
    // 获取课程详情
    initCourseInfo() {
      course.getCourseInfo(this.courseId).then((response) => {
        this.courseWebVo = response.data.data.courseWebVo
        this.chapterVideoList = response.data.data.chapterVideoList
        this.isbuy = response.data.data.isbuy
        console.log('购买情况：' + this.isbuy)
      })
    },
    initComment() {
      comment
        .getPageList(this.page, this.limit, this.courseId)
        .then((response) => {
          this.data = response.data.data
        })
    },
    addComment() {
      this.comment.courseId = this.courseId
      this.comment.teacherId = this.courseWebVo.teacherId
      comment.addComment(this.comment).then((response) => {
        if (response.data.success) {
          this.comment.content = ''
          this.initComment()
        }
      })
    },
    gotoPage(page) {
      comment.getPageList(page, this.limit, this.courseId).then((response) => {
        this.data = response.data.data
      })
    }
  }
}
</script>
